using System;

using System.Collections;

using System.Collections.Generic;

using System.Globalization;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

         ArrayList a = new ArrayList();

            a.Add(1);

            a.Add('C');

            a.Add("Minh");

            a.Add(true);

            foreach (var item in a)

            {

                Console.WriteLine(item);

            }

    }

}